Cytron UC00A Uživatelský manuál stáhnout pdf (Strana 22)

ROBOT . HEAD to TOE

Product User’s Manual – SK40C

5.4 USB Interface

USB is serial communication between microcontroller and computer. Previous Starter Kit

(SK40B) use RS232 Serial port for serial communication. RS232 is conventional way of

interfacing microcontroller to PC via serial port. Now USB is replace RS232 in serial

communication.

5.4.1 SK40C USB

USB data pins (pin 23, D- and pin 24, D+) were connected to a mini USB port on SK40C

board for USB development use. So far, Microchip has only 5 USB 8-bit microcontrollers in

40-pin PDIP package such as PIC18F4450, PIC18F4455, PIC18F4550, PIC18F4458 and

PIC18F4553. Microchip has USB software to support USB on 8-bit, 16-bit and 32-bit MCUs.

This software is royalty free source code which called MCHPFSUSB Framework and also

includes example projects. Download the appropriate USB stack for the target processor.

Each includes USB firmware for the microcontroller as well as a USB device driver for the

PC which allows the PC to treat the microcontroller as a USB device. Classes supported

include HID, CDC, MSD and generic.

User can download MCHPFSUSB Framework (Microchip Application Libraries) from

Cytron website under “Useful Document” of SK40C. Unzip it and install it after finish

download. “Microchip Solutions” folder will be created at your C Drive. All free framework

and example projects are inside the folder. For SK40C user, only the project with this name

“PICDEM FSUSB.mcp” is suitable for your project but you need do some modification on

“HardwareProfile – PICDEM FSUSB.h” because the SK40C’s switches and LEDs are

connected to different I/O pin if compare to the PICDEM FSUSB Demo Board. User can

download the PICDEM FSUSB Demo Board User’s Guide at Cytron website under “Useful

Document” of SK40C which has the schematic diagram for your reference.

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Cytron UC00A Uživatelský manuál Strana 22